Peony seed has abundant unsaturated fatty acid, fatty acid is up to 91.60%, and its linolenic acid and αlinolenic acid is up to 66.85%, αlinolenic acid is the basics and core of evolution of human life, and it is the main element in synthesis of cell membrane, and it has decisive effect to human health. αlinolenic acid in peony seed oil is the highest edible oil so far, and αlinolenic acid is the material basis of cytomembrane and biological enzyme, it has the decisive effect in human health. αlinolenic acid is the necessary and lack in food, needed add necessary nutritions. And it can't be compound in human body, it has to take in from externals. If human body lacks linolenic acid, it can cause immunity function lessening, amnesia, tired, hypopsia and atherosis etc.